Oven panel



July so, 1940. H, l.. GRAPP 2,209,816

OVEN PANEL v 175.152 April 4, 1938 Patented July 30, 1 940 l OVEN PANEL Herbert L. Grapp, Minneapolis, Minn. Application April 4. 1938, Serial No. 200,048

3 (Cl. 18s-34) I This invention .relates to an oven panel or wall. longitudinal edges and extending` at right angles Such panels are used as d oors, partitions and to the plates I and thus extendtoward each walls of ovens used for drying, baking and other other in substantially. the same plane. At one purposes and in which quite a high temperature side of each plate I0 a plate I2 is disposed is maintained. It ls desirable to have such an between the angles ll and the plates I0 and this 5 oven panel having high insulating qualities, a plate projects from they inner edge of ange IIa simple and inexpensive construction and yet one to a plane 1n which .the .aillacent edges 0f the which is strong and rugged to withstand the plates III' are disposed.' Each plate Il l is olfset necessary use. outwardly for a short distance away, from the l0 It is an object of this invention to provide an plate I2 as shown at Illa to form a longitudinally l0 oven panel of simple and inexpensiveconstruc extending slot Illb between plates III/and I2. The

tion and one having the flat sides thereof insu- Y slot Ib has a width equal to the thickness of lated froml each other in a very effective manner. plates I0. It will be noted that the adjacent It is a further object of the invention to proedges 0f hgeS lll)v are spaced a Considerable 15 vide a simple and eilicient construction of oven distance fIOm each other S0 that there iS a longi- 15 panel in which there is littleor no metallic path tudinally extending Slot 0I Space llc between said for conducting heat from the inner to the outer edges, which slot -or space extends throughout wall thereof. thelength of the panel at the narrow side there- It is still another object of the invention to of. Plates I3 may be provided to form end porprovide an oven panel of simple, strong and detions ofthe panel, these plates extending between 20 sirable construction and one having exceedingly the plates I0 and the angles II and fitting about high insulating qualities. the latter.'- "-'I he anges IIb of the angles II have These and other objects and advantages of elongated `slots IId formed therein adjacent their .the invention will be fully set forth in the folproximate edges and at comparatively wide inlowing description madein connection with the tervals. A connecting member is provided for 25 accompanying drawing in which like reference the angles-II and whileV various members might characters refer to similar partsfthroughout the be used, in the embodiment of the invention illusseveral views and in which: trated clips I4 are used. Clips I4 are. formed Fig. 1 is a View in front elevation of the panel; from a Small flat metallic Strip and the end D01'- Fig. 2 is a top view thereof; Y v tions thereof extend through the slots IId and 30 Fig. 3 isa View in side elevation of said panel; are reversely bent at the inner side of angles II Fig. 4 is a horizontal section taken on line 4 4' as shown at Ila in Fig. 4. The central portion of Fig. 3 as indicated by the arrows; I Ib of clip Il is oilset inwardly between anges Fig.l 5 is a partial view similar to Fig. 4 shown IIb and isili-contact with the reverselybent ends on an enlarged sealer Ita. The4 clips I4 therefore, extend across or y35 Fig. 6 is apartm perspect've view-of the panel; span the space llc and connect angle members Fig. 'l is aperspective view of a connecting clip Il. Asshown in Fig. 4 the outer endSjOf lthe' used; and flanges I Ib are rounded and this results in -a Fig. 8 is a partial view bf one of the side angles substantial opening extending vertically through 40 used. the loop formed by the bent ends of. the clip I4. 40

Referring to the drawing an oven panel or sec- The cross sectional area of the openings Ild` is tionof an oven `wall is shown comprising the alsor somewhat greater than the cross-sectional v at side portions I0 whichn as illustrated, are area of the clip Il disposed in said openings and made of flat plates. It will be seen that the panel there islmore or less of ajspace or air space in is substantially rectangular in transverse cross said opening -about or adjacent clip Il. Packing' 45 section and plates I0 are thus spaced a distance rmaterial I5 of anysuitable typesuch as rockequal to the thickness of the panel. The narrow wool is disposed between/plates I0' and between side portions of the panel are formed principally` the angles II at the opposite sides of plates I0. by' members Il, While these members might, be --Angle bars I6 extend in spaced relation transvariously made, in the embodiment ,of the invenversely of plates I having one o/ftheir anges 50 tion illustrated they are shown as angle members engaging and Sec v ed tothe inner sides .of said having one harige IIa. disposed ilat against and plates in any suitablemanner yas bywelding or secured to the inner side of the plate III adjacent riveting..r The other anges of angles I6 project the longitudinal edge thereof. 4The other anges inwardly. It will be noted that the angles I6 on I Ib of members lII are disposed adjacent said one of the plates are disposed substantially mid- 55 In()A tallicplates forming the at sides of saidpanel,

way between the angles IS on the opposite plate, said angles on the opposite plates thus being arranged in staggered relation. l

When a plurality of panels are used to form a wall they will be disposed as shown in Fig. 4. The portion I Dc'of the plates Ill projecting beyond the angles Il at one side of theA panel isv disposed in the slot Illb of the adjacent panel. A very secure, rigid and efficient joint is thus produced. Insulating inaterial I5 can be disposed between the angles H and clips I4 at the inner sides of the panel so that a continuous insulation eiect is produced.

From the above description it will be seen that I haveprovided "a very simple and yet highly eiiicient structure of oven panel or wall. It will be noted-that there is little or no continuous path from the inner wall of the panel to the outer wall thereof. The only metallic path through which the heat can pass from the inner .wall to the outenwail would be through the cups I4. Thisl` isnot a.v continuous, path on account of the air y space about the ends of the clips in the openings Hd. There is really, thereforef no continuous metallic path for the heat to pass through from the inner wall of the oven to the outer wall. This results in an unusually eiliient insulation. .A very high temperature canbe maintained at the inner side of the panel and yetaperson can hold their hand on the outer wall without discomfort. The structure at the same .time is very strong and rigid. The angles il make a very strong and rigid panel. The panel is further strengthenedand held in proper form by the member I6.

While the structure is thus strong and eflicient;

it is at the same time "simple and can be quite inexpensively produced. The panel has been amply demonstrated iny actual practice, found to be very successful and efiicient and isbeing" commercially made;

It will, of course, be understood that various changesrmay be made in the form, details, ar-

rangement' and proportionsofthe parts, without departing from the scope of applicants invention, which generally stated, consists in a. device capable of carrying out the objects above s'et forth, in theparts and combinations .of parts disclosed and dened in the appended claims.

Whatis claimed isz A 1. An oven panel comprising spaced flat meaaoasia rigid members secured to the inner sides of saidplates adjacent the longitudinal edges thereof so as to leave narrow projecting portions beyond said members, said plates at one longitudinal edge being offset, a narrow plate secured to each of said at plates along said offset edge and form'- ing a slot between the same and said oiset edge whereby an adjacent panel can have said projectingportion received inAsaid slot to form a connection between said panels and packing material in said panel between said flat plates and members.

2. An oven panel having spaced metallic plates and metallic portions extending from opposite4 plates toward each other adjacent the edges of said plates but spaced from each other to leave `an elongated opening therebetween and Widely spaced means of small dimension lengthwise of said panel connecting said portions to holdvthe same against ovement toward or from each v.other and spanning said opening and insulating being' of less cross-sectional areathan said apertures whereby a space is left in said apertures f adjacent said clips.

3. An oven panel having spaced iiat metallic side portions, members secured to said portions adtween said portions forming part o'fthe nar- -row sidesof said panel but spaced from each vmembers, insulating material disposed between said iiat portions and said members whereby a space extends-longitudinally of said panel at the- -f jacent their longitudinal edges and having portions extending substantially at right angles theretox so as, to extend toward each other benarrow sides thereof between said members exposing said packing, small narrow clips extend- `ing through said openings and spanning said space, said clips' being reversely bent at the lnner sides of said members, the outer central portienY of said clips being offset inwardly into said y space to engage-the adjacent sides of said members so that saidclipsgprevent movement of said members bothtoward and away from each other.

L. GRAPP. 

